Controlling means for gas-engines.



No. 87'7,044. 4 PATENTED JAN. 21, 1908.

H. W. BRADLEY.

CONTROLLING MEANS FOR GAS ENGINES.

APPLICATION FILED JUNE 20, 1904.

c SHEETS-SHEET 1.

PATENTED JAN. 21, 1908.

w. BRADLEY. CONTROLLING MEANS FOR GAS ENGINES.

APPLICATION FILED JUNE 20. 1904.

6 SHEETS-SHEET 2.

PATENTED JAN. 21, 71908.

H. W. BRADLEY. CONTROLLING MEANS FOR GAS ENGINES..

APPLICATION FILED JUNE 20.1904.

6 SHEETS-SH-EET 3- UUUU lnvenfrr.

No. 877,044. PATENTED JAN. 21, 1908.

H. W. BRADLEY. CONTROLLING MEANS FOR GAS ENGINES.

APPLICATION FILED JUNE 20. 1904.

6 SHEETS-SHEET 4.

No. 877,044. ATENTND- NAN. 21, 1903.

H. W. BRADLEY. CONTROLLING MEANS FOR GAS ENGINES.

APPLICATION FILED JUNE 20. 1904.

6 SHEE'fS-SHEBT 5.

1 Io.877,04A. I PATBNTED JAN. 21, 1903.

H. w. BRADLEY. Y

CONTROLLING MEANS FOR GAS ENGINES.

APPLICATION FILED JUNE 20- 1904.

6 $IEZTB-SHEET 6 ing oads or for slowly varying loads.

ing at full load the whole mass of fuel in the prrrr sirens conrnosmne MEANS non ensnn'emns.

Specification of Letters Patent.

Pate nted- Jan. 21, 1903.

Application filed June 20. 1904. Serial No. 213.364.

To all whom it may concern:

Be it known that I, HENRY Wrm'rwon'rn BRADLEY, a subject of the King of Great Britain and Ireland, and residing at'Wellington Works, Ashton -unde1wLyne, in the county of Lancaster, England, have invented certain new and useful Improvements in the Controlling Means for Gas-Engines, 'of which the following is a specification.

My invention relates to gas engines operatingwith suction gas producers, and my object is to so control or govern the gas engine that, notwitl'istanding great and rapid variations of load, the suction producer is always kept in a suihciently active state at light loads, as to immediately respond to the increased consumption of gas required at heavy loads.

My object, also'is to provided an attachment to gas engine governors which permits the overnor to be arranged for rapidly vary- 1n suction gas producers at present in use, the movement of the gas engine piston draws gas from a suction gas producer and air from the atmosphere. When the engine is workproducer isincandescent. If an. engine, however, works for aconsiderable period of time at a light load, then a s 'nallcr mess of fuel in the producer becomes incandescent, and any sudden increase in the air drawn through the producer to meet an increase of load results in deterioration of the gas supply. Where great variations of load occur, I have found that it is necessary to draw a certain minimum quantity of air through the producer.

My invention consists broadly in causing the engine to always draw gas from the producer at least at a minimum rate, this minimum. rate being such as will maintain a sullicient incandescent zone in the producerready to meet sudden increases of load.

The invention consists more s pecil ically in governing a suction producer gas engine by the usualmethod oi" throttling the gas supply up till the point when a certain minimum charge of gas is reached after which further governing is ei'l'ected by retarding the ignition, whereby the minimum amount of air required to maintain a sul'liciently incandescent zonein the producer is always sucked through by the engine.

' The invention also consists in the suction producer gas engine governing devices hereinafter described.

Referring now to the accompanying drawings, Figure 1 is a diagrammatic view showing an arrangement of suction gas producer and engine, the engine being provided with a by-pass according to the invention, Figs. 2 and 3 are enlarged details showing the arrangement of the gas and air passages, Fig. 2 being apart sectional elevation while Fig. 3 is a plan. Fig. 4 is a detail view of the gov.- ernor gear employed when the charge is ignited by an electric spark. Fi s. 5 and 6 are detail views of the hand controlling gear employed for adjusting the charge drawn into the engine at light loads. Figs. 7 and 8 show a side view and an end view respectively of an enginewith the present invention applied.

in one form; in Fig. 8 the gas sup ly pipe,

15, and the usual controlling cock ave-torthe purpose of simplification been omitted, these however, are clearly seen in Fig. 7.

In carrying the invention into effect according to one form the plant is arranged in the manner diagrammatically shown in Fig. 1. Gas is produced in the chamber 10 and is drawn by the piston of the engine 16, at its suction stroke through the pipe .11, coke scrubber 12, pipe 13, and sawdust scrubber 1 1 and so by the pipe 15 to the gas chamber l) of the engine 16 (Figs. 2 and 3). Here the gas oins with air drawn through a passage 0 and. the mixture passes through a spring-controlled valve 9 into the engine cylinder where the usual four stroke cycle of operations is carried out.

In order to maintain a suiiiciently incandescent Zone in the producer, a continually open by-pass a-is provided leading from the chamber b to the inlet passage 0. At right angles to the plane of the inlet valve g which is operated by a cam 25, (see Fig. 9) there is arrange the main gas inlet valve (1 opening into the chamber 1') and controlling the main outlet from this chamber to the inlet supply passage 0. The by-pass a is under the con trol of a cock c operated by a handle f which in some cases is also connected by a rod 7 (Figs. 5 and 6) with a cock 8 operated by a handle 6 and arranged to control the supply of air drawn in through the passage 0, the by-pass valve being arranged to open as the air valve closes whereby the quantity of air drawn through the producer may be effectively controlled to meet requirements.

The lift of the main gas valve (1 is controlled by the governor 17 through the gear lustrated in enlarged detail in Fig. 4. A

stepped die-piece 71, resting a ainst the end of the gas valve spindle. m an under the conhaving a pin 22 engaging between two coltrol of the centrifugal ates with. a pecker i to vary the extent of,

governor 17, cooperlacs on the governor sleeve which is moved in 'the well known manner by the rotating governor balls. On'the pivot lwhich is'sup- (Figs. 8 and 9),.

of the seeker i.

ported by a bracket 23 there is also mounted a lever n carrying at its end a pin 0 which when, the governor has moved the oscillating arm it through a certain distance, presses against a tail piece on a lever 11 pivoted about the point g. This lever carries at its end a contact i" which normally engages with. a tired. contact 3. These contactsare in the igniting circuit so that by moving the corn tact r the circuit is broken and the ignition in consequnce stopped or retarded. This does not occur, however, until after the governor has moved. the stepped die piece 7t out of the path of the pecker i,

The operation of this governing device is as follows. Under normal full load the pecker i strikes the highest step in. the die piece 72 during each charging stroke of the engine. Gas is thus drawn from the producer as described above through the pipe 15 while air drawn in through the pipe 0, When the load falls the governor raises the die piece till a lower step on the die piece it engages with the pecker i and consequently a smaller opening add one of shorter duration. is given to the gas valve d, or if the fall in load is considerable the die piece it may be moved quite out of the path In consequence of this the valve all does not receive any opening, but nevertheless gas isdrawn from the gas chamber 6 into the cylinder through the bypass a. If the engine is to be running for some time under light load the mixture so drawn. in may be arranged to be a combustible one by suitably proportioning the open oi the cocks e and 8. In some cases also the cock may be omitted as shown in 8 and 9 and the nroportioning of the mixture drawn in at ight loads may be effected only by the gas cook c. It-willbe understood that during the time that governing being effected as described above the pin 0 has not been. brought to bear on the tail piece of the lever p and in consequence the ignition has-been taking place in the usual way. if now the load on the engine falls still further, the lever it rises sulliciently under the action of the governor to cause the levr n to carry the pin 0 against the tail piece of the lever p. n way the igniting having circuit is broken and the ignition stopped or retarded according asthe-governor acts.

By this device the incandescent Zone in the producer is maintained Without limiting the valve 9 in the'manner described with refer ence to the gas valve d. In this case, however, the by-pass leads direct into the com bustion chamber and is; provided with an automatic non-return valve. Further although I have-described my inventionas applied to a gas engine having an electric ignition it may be employed in conjunction with any form of suction gas engine and ;.I wish it to be understood that I do-not limit myself to the details hereinbefore described I and shown on the drawings. Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In cornblnatlon with an internal combustlon engine and a suction gas producer, a

gas inlet valve for the engine and a contin-,

ually open by pa-ss leading from the roducer to the engine past the gas inlet va ve, through which by-pas's a minnnum quantity of gas is drawn tomaintain an incandescent zone in the producer. 2. A gas engine working with suction gas plant having a valve controlled gas inlet passage to the working e no ly open by-pass lea ing from said passage to said cylinder, substantially as described.

A suction gas engine having a valve controlled gas inlet passage to the Working cylin der, a valve controlled char e inlet passage into-which said gas passage leads, a continually open-by-pass from said gas passage to said charge passage, substantially as de scribed. l

4. A suction gas engine having a charge inlet passage to the working cylinder, a gas supply passage leading thereto, a valve control ing the opening of said gas passage to the charge passage, governor control means for said valve, a continually open by-p'ass from said passage to said charge inlet passage, sub stantially as described- 5. Asuction gas engine having a valye controlled gas inlet passage and a continually.

from said gas inlet to the work-f l ing cyhnder, governing means for controlling gas valve, until at higher open bypass linder and a eontin- 0 70 t e engine may read ly respond to increased d than that required to chest the reduction of the gee valve opening to oil, substantially es 1 and for the purposes hereinbefore described. 6. A suction gas engine having in cornlii- 5 nation aoharge inlet passage and c valve therefor, 2t gas inlet essa-gc opening to said charge inlet and e vs five for said gas passsge, a continually open by-pn-ss leading from said. gas passage to said charge passage and o control device for said. by poss, substantially as described. r

. '7. A suction gas engine having in combination with the vvorkingcyhnrier governing means comprisiug nesns operating only at normal s eeds for throttling. admission of working; uirl to the cylinder and means oper sting only at higher speeds for controlling iigniticn of said working fluid, substantially "as described. p

' 8; A suctiorrgos engine having in comhi nation with the Working cylinder governing means comprising means operating only at norrnclspeeds for throttling the admission of gasalndpmeons operating only at higher as described.

9. A suction gas engine having in combination with the working cylinder governing means comprising means operating" only at normal speeds for throttling to a certain minimum the admission of Working fluid to the cylinder and means operetin only at hi -her speeds for cutting out sci ignition, sn l stantiolly as described.

10. A suction gas engine having a eontim olly open passage between the producer and the envine, a .main gas passage and inlet valve therefor, a cam operating said valve, governing means oo-ecting with said cam for reducing the amount of opening of said gas valve as the s eed increases, on imition device conneote to said governing l$&l1S,Sfli(l connections bein arranged to leave the igni- I t-ion device one ected until such speeds are plant having in combination. with. the wor speeds for controlling ignition, subs tentially ting the motion. of the pecker to the valve,

connection between said. s ,ep piece it enrl the governor for regulating the opening of the valve, :1- contact carried by a pivoted lever p, a pin 0 operated by the governor and adapted to move said contact alter the step pi hes been moved. into a position in Wl'] does not co-net with the pecker i, suostem ticfily as described.

l A engine Working Witl'l suction mg cylinder, a valve controlled message to the working cylinder, 21- continuelly open lay-pass leading from said pessage to soirl cylinder and means for controlling the 09cm, ing of said bypass, substantially as curl for the purpose described.

13. A suction gas engine having; in conjunction with the Working cylinder, governs 'ing means coin rising means operating only at normal and ow speeds for throttling to certain mlnimum the admission of gas to the cylinder and means operating only at higher;

speeds for controlling the ignition, subston troll as described.

14. A suction engine having in conjunction with the working cylinder, egos pessage to said cylinrl er, nrnech enically oper ated valve controlling said passage, an additionol continually open gas passage to said cylinder, hand controlled means for adjusting the opening of said additional passage. In Witness whereof I heme hereunto set my hand in presence of two Witnesses.

Witnesses:

li osnn'r lcionnrso v NEILSON, lrvrAs ARTHUR Hoovers, 

